Now, to convert a fraction to decimals you simply have to divide the top number by the bottom number and then round-off to the degree of accuracy that you need (i.d. one, two or more positions after the point).

But what if you don't have a pocket calculator is there another simple way to convert fractions to decimals?

Yes there is, but only for fractions which have 10 or a power of 10 as denominator. So:

Fractions to decimals rules

1. Look if the denominator is 10 or one of its powers (100, 1'000, 10'000, 100'000 etc,,,)

2. If not, correct the fraction by converting the denominator to 10 or one of its power
(e.g. 3/5 = 6/10; 7/4= 175/100 etc...how I did it? Well I multiplied BOTH top and bottom by the same amount, so 3/5 * 2/2= 6/10 and 7/4 * 25/25 = 175/100. This is the "1" trick, in this case 2/2 and 25/25)

3. What decimal number is 5/25?The solution is 5/25 = 0.2
Why?
Because 5/25 = 20/100
(I multiplied BOTH denominator and numerator by 4; this is the "1" trick:
you are allowed to multiply anything by 1 because this operation leave everything unchanged.
In this case the "1" is 4/4)
so 5/25 = 20/100 = 2/10
(I now simplified both denominator and numerator by dividing BOTH of them by 10
(again, this is the "1" trick, here the 1 is 10/10).
And finally, 2/10 = 0.2

WAIT!

Not clear enough?

Don't worry, that's more than normal, even Leonardo Da Vinci was not very good at fractions, did you know?.